You can buy (rent, access, whatever) their product with one of two forms of payment: money or ads. If you don't like how their ads are delivered (admittedly fair) then pay, if you don't find either of those acceptable then you don't get their product. Disabling ads is requesting a completely free third option, which isn't something they choose to allow.

I don't understand the entitlement you seem to feel to demand that third option.